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(No Model.) 2 Sheets-Sheet 1.

A. AWHITE 8v D. F. SULLIVAN. sToP MoIIoN FCR CIRCULAR KNITTINC MACHINES.

No. 588,781. Patented Aug. 24,1897@ (No Model.) 2 Sheets-Sheet 2.

A. WHITE 8u D. P. SULLIVAN.' STOP MOTION FOR CIRCULAR KNITTINC MACHINES.

No. 588,761. Patented Aug.24,1897.

A F.g/f WITNEEEEE. Www/M 1f UNITED STATES PATENT FFICE.

ALBERT VIIITE AND DANIELAF. SULLIVAN, OF LOIVELL, MASSACHUSETTS; SAID SULLIVAN ASSIGNOR TO MARY SULLIVAN, OF SAMEPLACE.

STOP-MOTIONl-'OR CIRCULAR-KNITTING MACHINES.

SPECIFICATION forming part 0f lI etters Patent No. 588,761, 'dated August 24,y 1897. A

Application filed December 1l, 1896. Serial No. 615,293 (N0 model.)

To all whom, it may concern."` n

Be it known that we, ALBERI` WHITE Middlesex, and State of Massachusetts, have made certain new and usefullmprovements.

elevation, enlarged, of the presser-wheel and its support, looking from the left, on line 3 3 in Fig. 2; Fig. 4, afront elevation of the same on line 4 4 in Fig. 2 Fig. 5, a perspective View,l

` partly in section, showing the presser-wheellocking mechanism; Fig. 6, a sectional elevation, enlarged, showing the hand-shipper and magnet release mechanism; Fig. 7, a top plan view of the same 5 Fig. 8, a side elevation of the block containing the presser-wheelsupport Fig. 9, a vertical transverse section of the saine, and Fig. 10 a perspective view of the support detached from the star-box.

Like letters and ligures'of reference indicate corresponding parts in the different Iigures of the drawings. Y

Our invention relates especially to an improvement in stop-motions whichembodies a thread-supported drop-wire, and is designed particularly as an improvement On/the device shown and described in our application for Letters Patent, iiled September 17, 1896, Se-v rial No. 606,121, the object being to adapt an electrically-actuated mechanism to operating said support.

The nature of the improvement will be understood by those conversant with such mat-v ters from the following explanation.

In the drawings, A represents the base or bed of the machine, and C the needle-cylinder, these parts being of the usual form and arrangement.

and DANIEL F. SULLIVAN, of Lowell, county of' D represents the hand-shipper, which is pulledby a spring b in the usual Inanner.

The rotarypresser-wheel B, having pendent projections 15 on its underside, is mounted on a stud, which screws into a socket 16 (see Fig. 9) in the presser-support 17. This support is fitted to slide laterally. on a block 18, mounted on spindle d and adjustable longitudinally by means of star-box f. A pin q, fast in the support 17, slides in a suitable socket in block 18, and a pull-spring 19, connecting pins o on said support and block, tends to draw them together. A pivot p passes through an oblong opening 2O in the support and permits a lateral movement of the same. This construction varies from that in the application referred to in that the presser-wheel instead of rocking or tilting against the needles is moved horizontally.

On the pivot p a block 2l is mounted to rock, and in said block a support 22 is pivoted at 23 to rock vertically at right angles to said block and carries the drop-wire h and a blade 24, which may be projected into the path of the fingers 15 on the presser-wheel B. A rightangle lever s is pivoted at 27 on the block 18 and is provided with an opening 28, which may be registered with the pin t on the support 17. 0n the block 2l are two pins 25 and 26, which engage, respectively, the upper and lower edges (see Fig. 5) of the free arm of the right-angle lever s, actuating said lever to register its opening 2S with the pin twhen the block 2l is rocked, thus permitting the spring 19 to retract the presser-wheel support. The

drop-wire h passes under the looper-support L and under the tl1read-guide 30, resting on the thread 3l in the usual manner and as described in the application before referred to.

Running transversely of the bed there is a rock-shaftr 32, having a fast crank-handle 33, which connects by nleansof a pivoted rod 34 with the hand-shipper D, said rod being hooked at 35 to overlap said shipper. Piv.

oted under the bed there is a bell-crank lever 36, (see Fig. 1,) arranged to swing vertically, one arm thereof being pivotally connected to a rod 37, which connects with the crank-arm 3S on the shaft 32. On the opposite arm ofA this bell-crank a pin 39 rests and is fitted to IOO slide vertically through the bed A and engage the drop-wire support 22. One of these rods 37, as indicated at 40 in Fig. 2, is connected with the shaft 32 and operates a similar mechanisin for each feed on the machine, as seen at B2 and 71,2 at the right in Fig. 2.

Under the bed is mounted a storage battery K, one wire, 11, of which is connected by a binding-post 42 with the metal of the machinebed. The other wire, 43, connects with a pole of an electromagnet P. From the opposite pole wires 45, insulated from the machine, lead upward through the bed and the block 18 to a point adjacent the edge of each presserwheel on the machine. The ends of these wires are exposed, so as to make an electrical contact with said presser when moved outward from the needle-cylinder, as best seen in Figs. 3 and 4. A lever Ris pivoted by one end to a support 5() on the under side of the bed and is provided with a laterally-projecting boss The free end of said lever is projected into the iield of the magnet and the downward movement thereof is limited by a stop 51. On the hand-shipper D there is a rigid arm 55, provided with a hook end 56, which engages the boss and resists the spring b, preventing the movement of said hand-shipper until said arm is freed by the upward movement ot' the lever R. On the rock-shaft 32 there is a handle (S0 for setting the device by hand after the shipper has been operated to stop the machine.

In the use of our improvement when the shipper is operated by hand it is sprung slightly downward, freeing the hook end 5G of the arm 55 and permitting spring b to throw it from left to right, as viewed. This carries rod 34, rocks the shaft and by means of the rod 37 operates the bell-crank 36 to project the pin 39 upward into contact with the drop-wire support, preventing the fall of said wire.

Vhen a thread breaks, the wire 7L falls. It throws blade 24 in to the path of projections on the rotating` presser-wheel, by the engagement of which the block 2l is rocked inward, throwing the right-angle lever s upward until its opening 28 registers with the pin t. The spring 19 now acts to retract the presser-support and engage the edge of the presser-wheel with the exposed end 4G of the wire 45, closing the electric circuit and charging the magnet P. The armature or free end of lever R is thereby attracted, unlocking the hand-shipper and permitting its spring to move it. This aetuates the rock-shaft and projects the support 39 under the drop-Wire, as above described, when the shipper is operated by hand.

Having thus explained our in venlion, what we claim is- 1. In a stop-motion for circular-knitting machines embodying a horizontally-movable presser, the combination with locking mechanism therefor and releasing devices comprising a drop-wire, o'f an electric circuit closed by the movement of said presser; and mechanism operated by the closing of said circuit for projecting a support under said drop-wire.

2. In a stop-motion for circular-knitting machines embodying a horizontally-movable presser-wheel, locking mechanism therefor an d releasing devices embodying a drop-wire, in combination with an electric circuit closed by the movement of said presser; a springoperated shipper released by the closing of said circuit; and mechanism operated by the movement of said shipper for projecting a support under said drop-wire.

3. The combination with the horizontallymovable presser-wheel of locking mechanism therefor; and releasing devices embodying a drop-wire, of the spring-actuated shipper; locking mechanism therefor; and an electric circuit adapted to be closed by the movement of said presser; an electromagnct in said circuit operating to release said locking meehanism; and devices actuated by the movement of the shipper for projecting a support under said drop-wire.

4t. In combination with the rotary presserwheel mounted on a horizontally-sliding support of a locking mechanism therefor; a dropwire mechanism for releasing said presser; an eleetromagnetthe circuit of which is closed by the movement of said presser; a verticall y-movable support adapt-ed to engage said drop-wire; a spring-actuated shipper; locking mechanism therefor released by the charging of said magnet; and mechanism actuated by the movement of the shipper for engaging said support with the drop-wire.

ALBERT NVHITE. DANIEL F. SULLIVAN.

NVitiiesses:

O. M. SHAW, T. M. SHUTIJ.

IOO 

